CN201976118U - Indoor coverage system of frequency modulation broadcast - Google Patents
Indoor coverage system of frequency modulation broadcast Download PDFInfo
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- CN201976118U CN201976118U CN2011200853595U CN201120085359U CN201976118U CN 201976118 U CN201976118 U CN 201976118U CN 2011200853595 U CN2011200853595 U CN 2011200853595U CN 201120085359 U CN201120085359 U CN 201120085359U CN 201976118 U CN201976118 U CN 201976118U
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Abstract
The utility model discloses an indoor coverage system of frequency modulation broadcast. An input end of each set top box of a central system platform is connected with an output end of a wired television distributor by the aid of a coaxial cable, an output end of each set top box is connected with an input end of a corresponding frequency modulator via an audio cable, each frequency modulator is connected with an input end of a signal mixer via a radio frequency interface, an output end of the signal mixer is connected with a light transmitter, a first light transmission network in a network system is connected with an input end of each optical amplifier of each branch central machine room, an output end of a optical branching device of one of the branch central machine rooms is connected with an input end of a second light transmission network, an output end of the second light transmission network is connected with an input end of the corresponding indoor coverage system, an output end of a another light optical branching device of another branch central machine room is connected with an input end of a third light transmission network, and an output end of the third light transmission network is connected with the corresponding indoor coverage system. Accordingly, a more reliable receiving mode for information sources of the frequency modulation broadcast is implemented by the indoor coverage system of the frequency modulation broadcast.
Description
Technical field
The utility model relates to a kind of FM broadcasting indoor covering system, relates in particular to frequency modulation broadcast system, belongs to networking technology area.
Background technology
In recent years in order to solve the urban traffic congestion problem, a lot of urban construction cavern, underground, cross tunnels such as river and highway, these tunnels substantially all do not carry out FM broadcasting and cover, and the tunnel of basement, underground garage and the highway of some heavy constructions does not all solve the covering problem of FM broadcasting in addition.When vehicle sailed long tunnel into, because the existence of broadcast singal blind spot, normally broadcast listening allowed a lot of drivers feel lonely irritated.
In addition, the tunnel management personnel can not be by the every regulation and the traffic safety information of driving a vehicle in driver and crew play the tunnel, if when occurring situation such as obstruction, traffic accident, breaking out of fire in the tunnel, tissue is dredged vehicle and personnel's intervention schedule and is broadcast the announcement mode with regard to having lacked a kind of important information.Thereby, no matter consider all have very big necessity and importance for the covering of FM signal blind areas such as tunnel from each side such as FM broadcasting service, fail safes.
The covering of FM broadcasting blind areas such as present tunnel adopts the mode of open circuit wireless receiving, special-purpose frequency modulation broadband power amplifier and leaky cable to solve basically, wireless signal is after antenna receives, amplifies outside the tunnel, send into FM frequency modulation broadband power amplifier, its output inserts leaky cable, and leaky cable evenly leaks the frequency modulation electromagnetic wave by certain leak rate and covers with the broadcast singal of realizing former blind area in the tunnel.We are from operation, management equal angles analysis-by-synthesis, still there are problems in such scheme, at first such scheme can not satisfy the demand of concentrating operation management, each tunnel all will be built the reception and the treatment system of FM signal separately, these system equipments will take the memory space of tunnel machine room, and environmental vibration is big, moist, ventilation is poor in the tunnel, the system in each tunnel all needs professional's maintenance and management, causes shortcomings such as the wasting of resources, complex management, maintenance cost height easily.Secondly, the aerial open circuit receive mode of FM broadcasting can not guarantee signal receiving quality reliably, is subjected to external interference easily.
In January, 2010 State Council's decision accelerates to advance the integration of three networks development of telecommunications network, broadcasting and television network, the Internet, the expansion Optical Fiber Transmission coverage that the various places networking is suited measures to local conditions, substantially realized the covering of optical fiber to turnpike road, we do not need to lay separately the optical fiber between indoor frequency modulation blind areas such as tunnel and the central machine room substantially, can make full use of these fiber resources these blind spots and central machine room are coupled together, thereby the unification that realizes the FM broadcasting covering system is built and centralized management.
The utility model content
The purpose of this utility model provides a kind of FM broadcasting indoor covering system.
For achieving the above object, technical solution adopted in the utility model is:
First kind of FM broadcasting indoor covering system of the present utility model comprises center system platform, network system and indoor covering system; Described center system platform comprises and is used to distribute with the catv distributor of transmission of digital broadcast singal, above set-top box, frequency interleaved modulation modulator, the signal mixer corresponding with set-top box and is used for and will closes the optical sender that the road fm broadcast signal is transferred to first optical transport network; The input of described each set-top box is connected with the output of catv distributor by coaxial cable respectively, the output of described each set-top box is connected with the input of corresponding frequency interleaved modulation modulator by tone frequency channel wire respectively, described each frequency interleaved modulation modulator is connected with the input of signal mixer by radio frequency interface, and the output of described signal mixer is connected with described optical sender; Described network system comprises first optical transport network, two branch center machine rooms, second optical transport network, the 3rd optical transport network and corresponding indoor covering system, each branch center machine room comprises interconnective image intensifer and optical branching device, described first optical transport network is connected with the input of the image intensifer of each branch center machine room, the output of the optical branching device of one of them branch center machine room is connected with the input of second optical transport network, the output of second optical transport network is connected with the input of corresponding indoor covering system, and the output of the optical branching device of another branch center machine room is connected with the input of the 3rd optical transport network; The output of the 3rd optical transport network is connected with corresponding indoor covering system.
Further, indoor covering system described in the utility model comprises first optical receiver and frequency modulation repeater, and comprise antenna system or leaky cable system, the input of described first optical receiver correspondingly is connected with second optical transport network or the 3rd optical transport network of described network system, the output of described first optical receiver is connected by the input of radio frequency line with the frequency modulation repeater, and the output of described frequency modulation repeater is connected with antenna system or leaky cable system by radio frequency line.
Further, indoor covering system described in the utility model comprises image intensifer, optical branching device, second optical receiver, the 3rd optical receiver and frequency modulation repeater, and comprise antenna system or leaky cable system, the input of described image intensifer correspondingly is connected with second optical transport network or the 3rd optical transport network of described network system, the output of described image intensifer is connected with the input of optical branching device, the output of described optical branching device is connected with the input of second optical receiver with the 3rd optical receiver respectively, each is connected with the input of a described frequency modulation repeater output of described second optical receiver and the 3rd optical receiver by radio frequency line respectively, and each is connected with an antenna system or leaky cable system the output of each described frequency modulation repeater by radio frequency respectively.
Second kind of FM broadcasting indoor covering system of the present utility model comprises emergency center system platform, network system and emergent indoor covering system; Described emergent indoor covering system comprises indoor covering system and emergency broadcase system; Described emergency center system platform comprises the catv distributor that is used for receiving digital broadcast signal, above set-top box, the first broadcast microphone, first audio frequency apparatus, first sound console, first Audio Matrix, first frequency interleaved modulation modulator, first signal mixer and be used for and will close first optical sender that the road fm broadcast signal is transferred to first optical transport network more than one; The output of described catv distributor is connected with the input of each set-top box by coaxial cable respectively, the described first broadcast microphone is connected with the input of first sound console respectively with first audio frequency apparatus, the output of described first sound console, the output of each described set-top box is connected with the input of described first Audio Matrix respectively, the output of described first Audio Matrix is connected with the input of each first frequency interleaved modulation modulator by tone frequency channel wire simultaneously, the output of each first frequency interleaved modulation modulator is connected with the input of described first signal mixer respectively, and the output of described first signal mixer is connected with the input of described first optical sender; Described network system comprises first optical transport network, two branch center machine rooms, second optical transport network, the 3rd optical transport network and corresponding indoor covering system, each branch center machine room comprises interconnective image intensifer and optical branching device, described first optical transport network is connected with the input of the image intensifer of each branch center machine room, the output of the optical branching device of one of them branch center machine room is connected with the input of second optical transport network, the output of second optical transport network is connected with the input of corresponding indoor covering system, and the output of the optical branching device of another branch center machine room is connected with the input of the 3rd optical transport network; The output of the 3rd optical transport network is connected with corresponding indoor covering system; Described emergency broadcase system comprises optical receiver, the multichannel FM demodulator, the second broadcast microphone, second audio frequency apparatus, second sound console, second Audio Matrix, second frequency interleaved modulation modulator more than one, secondary signal blender and be used for and close second optical sender that the road fm broadcast signal is transferred to indoor covering system from what the secondary signal blender received, described optical receiver is connected with the multichannel FM demodulator, the second broadcast microphone is connected with the input of second sound console respectively with second audio frequency apparatus, second Audio Matrix is connected by the input port of tone frequency channel wire with each second frequency interleaved modulation modulator, the output of each second frequency modulator is connected with the input of described secondary signal blender respectively, and the output of described secondary signal blender is connected with the input of described second optical sender.
Further, indoor covering system described in the utility model comprises first optical receiver and frequency modulation repeater, and comprise antenna system or leaky cable system, the input of described first optical receiver correspondingly is connected with second optical transport network or the 3rd optical transport network of described network system, the output of described first optical receiver is connected by the input of radio frequency line with the frequency modulation repeater, and the output of described frequency modulation repeater is connected with antenna system or leaky cable system by radio frequency line.
Further, indoor covering system described in the utility model comprises image intensifer, optical branching device, second optical receiver, the 3rd optical receiver and frequency modulation repeater, and comprise antenna system or leaky cable system, the input of described image intensifer correspondingly is connected with second optical transport network or the 3rd optical transport network of described network system, the output of described image intensifer is connected with the input of optical branching device, the output of described optical branching device is connected with the input of second optical receiver with the 3rd optical receiver respectively, each is connected with the input of a described frequency modulation repeater output of described second optical receiver and the 3rd optical receiver by radio frequency line respectively, and each is connected with an antenna system or leaky cable system the output of each described frequency modulation repeater by radio frequency respectively.
Be compared with the prior art, the utlity model has following beneficial effect:
(1) the utility model utilizes unique network architecture, system platform is concentrated construction and management, do not need each tunnel to build the reception and the treatment system of FM signal separately, reduced the memory space of tunnel machine room, reduced the maintenance and management cost of system.
(2) the utility model provides a kind of more reliable FM broadcasting information source receive mode, and the open circuit wireless receiving is adopted in the covering of FM broadcasting blind areas such as present tunnel basically, and this mode can not guarantee signal receiving quality reliably, is subjected to external interference easily.The utility model receives and handles FM signal by top box of digital machine, the signal of reception is a digitized signal, and reception and processing by wired mode, can not be subjected to the interference of extraneous wireless signal, has guaranteed the quality of signal source.
(3) the utility model has designed two kinds of network architectures, comprises the design of emergent FM broadcasting indoor covering system, emergency broadcase system can be concentrated construction, and it is indoor also emergency broadcase system can be designed into tunnel etc.The utility model has also designed network architecture, guaranteed FM signal reliable, effectively and low cost to be transferred to tunnel etc. indoor.
(4) network architecture of the present utility model can carry more business, because concentrating, system builds, can insert indoor needed signals such as multichannel tunnel in centring system, such as signals such as Digital Television CMMB, public security fire-fighting cluster, 450M private network clusters, thereby provide abundant professional and service for tunnel etc. is indoor.
Description of drawings
Fig. 1 is a center system platform structural representation block diagram of the present utility model
Fig. 2 is a network architecture schematic block diagram of the present utility model;
Fig. 3 is the structural representation block diagram of first kind of execution mode of indoor covering system of the present utility model;
Fig. 4 is the structural representation block diagram of second kind of execution mode of indoor covering system of the present utility model;
Fig. 5 is an emergency center system platform structural representation block diagram of the present utility model;
Fig. 6 is the emergency broadcase system structural representation block diagram of emergent indoor covering system of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
The technical solution of the utility model comprises two kinds of FM broadcasting indoor covering systems.
First kind of FM broadcasting indoor covering system of the present utility model comprises center system platform, network system and indoor covering system, and the structural representation block diagram of center system platform as shown in Figure 1.
Among Fig. 1, digital broadcast signal is meant the digital broadcast signal of coming by the wired cable Network Transmission of Digital Television, as the digital signal of modulating FM channel.Digital broadcast signal is imported catv distributor by coaxial cable.The catv distributor back can connect one or more set-top box, the channel configuration that the concrete quantity of set-top box covers according to the FM broadcasting needs, the corresponding fm broadcast channel of set-top box.Among Fig. 1, set-top box 1, set-top box 2 ... set-top box 10 is connected with catv distributor by coaxial cable respectively, and each set-top box is connected with a corresponding frequency interleaved modulation modulator by tone frequency channel wire, is used for receiving and handles digital broadcast signal and produce one road fm broadcast signal.
First signal mixer is connected with more than one first frequency interleaved modulation modulator, specifically as shown in Figure 1, frequency interleaved modulation modulator 1, frequency interleaved modulation modulator 2 ... frequency interleaved modulation modulator 10 is modulated to fm broadcast signal on the corresponding modulation frequency respectively, pass the signal in the signal mixer by radio frequency interface, the multichannel fm broadcast signal is mixed back generation one tunnel close the road fm broadcast signal, optical sender received signal blender obtains closing the road fm broadcast signal and this signal is transferred in the network system.
Catv distributor, frequency interleaved modulation modulator, signal mixer and optical sender can utilize the existing equipment on the market, and set-top box can adopt prevailing broadcast type digital TV set-top box, can receive the digital audio broadcast singal and get final product.
The signal source of center system platform of the present utility model is the digital audio signal of Digital Television, sound quality is good, signal stabilization is reliable, adopt digital TV set-top box to receive, set-top box receives and handles one road fm broadcast signal, can guarantee the decoding effect of digitized signal fully, simultaneously by coaxial cable reader top box, do not have intermodulation, interference etc. between each set-top box, can guarantee the reception of multichannel fm broadcast signal and handle quality.With wireless open circuit receive mode contrast, the signal source quality of center system platform of the present utility model is higher, and reception and processing signals steady quality are reliable, are not subjected to external interference.
The network architecture of first kind of FM broadcasting indoor covering system of the present utility model as shown in Figure 2.
As shown in Figure 2, the road fm broadcast signal that closes from center system platform is imported first optical transport network, the fiber optic network that first optical transport network is made up of optical fiber link etc., first optical transport network will close the road fm broadcast signal and be transferred to 2 branch center machine rooms, each branch center machine room comprises interconnective image intensifer and optical branching device, first optical transport network is connected with the input of the image intensifer of branch center machine room, the output of the optical branching device of a branch center machine room is connected with the input of second optical transport network, the output of second optical transport network is connected with the input of the indoor covering system in tunnel 1, and the output of the optical branching device of another branch center machine room is connected with the input of the 3rd optical transport network; The output of the 3rd optical transport network is connected with the indoor covering system in other corresponding tunnel.
To different tunnel transmission, support is transferred to other tunnel to signal of the present utility model again from the overlay network in tunnel from the branch center machine room.Can make full use of fiber resource according to the distance of signal, the adjacency in tunnel like this.
Indoor covering system of the present utility model comprises two kinds of indoor covering systems, and first kind of indoor covering system structural representation block diagram as shown in Figure 3.
Among Fig. 3, indoor covering system comprises first optical receiver, frequency modulation repeater, antenna system or leaky cable system 1.
Wherein, first optical receiver receives that network system transmits closes the road fm broadcast signal, and is connected with the frequency modulation repeater by radio frequency line.Described frequency modulation repeater receives closes the road fm broadcast signal, signal is continued processing such as filtering, amplification, and is connected with antenna system or leaky cable system 1.Antenna system is crossed antenna and will be closed the road fm broadcast signal and be sent on the terminals such as broadcast receiver, and 1 of leaky cable system will close the road fm broadcast signal by leaky cable and be sent to equably on the terminals such as broadcast receiver.
Second kind of indoor covering system structure of the present utility model as shown in Figure 4.Indoor covering system among Fig. 4 comprises image intensifer, optical branching device, optical receiver, frequency modulation repeater, antenna or leaky cable system, and described image intensifer amplifies signal, and delivers to optical branching device; Optical branching device will close road fm broadcast signal demultiplexing signal, deliver to different optical receivers respectively by optical fiber, what described frequency modulation repeater received optical receiver closes the road fm broadcast signal, signal is continued processing such as filtering, amplification, and is connected with antenna or leaky cable system; Antenna system will be closed the road fm broadcast signal by antenna and will be sent on the terminals such as broadcast receiver, and the leaky cable system will close the road fm broadcast signal by leaky cable and be sent to equably on the terminals such as broadcast receiver.
First kind of indoor covering system structure of the present utility model mainly is applicable to short tunnel, can cover FM signal with a frequency modulation repeater; Second kind of indoor covering system structure mainly is applicable to long tunnel, can expand to connect the multichannel repeater and finish long FM signal apart from the tunnel and cover.
Further, the frequency modulation repeater among Fig. 3 and Fig. 4 mainly is made up of each several parts such as filter, LNA, power amplifier module, control circuit, alc circuit, coupler, power supply and GPRS passback modules.The utility model has carried out integrated, modularized design with input tape bandpass filter, wide-band amplifier, output filter etc., and wherein, band pass filter adopts the spiral cavity filter of high selectivity, thoroughly other frequency signal of filtering and interference signal.Power amplifier adopts the synthetic amplifying technique of multichannel, finishes the amplification of a plurality of frequency signals with single power amplifier, has guaranteed the high reliability of system, easily autgmentability and ease for maintenance.The utility model will be done further perfect in existing frequency modulation repeater in the market by as above method, improve performance and better be suitable for indoor FM signal such as tunnel and cover.
Second kind of FM broadcasting indoor covering system of the present utility model comprises emergency center system platform, network system and emergent indoor covering system.
Wherein, the structural representation block diagram of emergency center system platform as shown in Figure 5.
Among Fig. 5, digital broadcast signal refers to the digital broadcast signal of coming by the wired cable Network Transmission of Digital Television, as the digital signal of modulating FM channel.Digital broadcast signal is imported catv distributor by coaxial cable.Set-top box 1, set-top box 2 ... set-top box 10 is connected with catv distributor by coaxial cable respectively and is connected with frequency interleaved modulation modulator by tone frequency channel wire, is used for reception and processing digital broadcast signal and produces one road fm broadcast signal.The channel configuration that the concrete quantity of set-top box covers according to the FM broadcasting needs, the corresponding fm broadcast channel of set-top box.
Among Fig. 5, the first broadcast microphone can be imported emergent voice broadcast, first audio frequency apparatus can be play the tunnel audio content, the audio frequency of broadcast microphone and audio frequency apparatus is connected with sound console by tone frequency channel wire, sound console by tone frequency channel wire output microphone and audio frequency apparatus to Audio Matrix equipment, Audio Matrix is to the FM broadcasting audio signal of each set-top box input, the audio signal of sound console is exported switching, the audio signal that is switched by tone frequency channel wire respectively with frequency interleaved modulation modulator 1, frequency interleaved modulation modulator 2 ... the input port of frequency interleaved modulation modulator 10 is connected, these frequency interleaved modulation modulators are modulated to fm broadcast signal on the corresponding modulation frequency, pass the signal in the signal mixer by radio frequency interface, described signal mixer and frequency interleaved modulation modulator 1, frequency interleaved modulation modulator 2 ... frequency interleaved modulation modulator 10 is connected, the multichannel fm broadcast signal is mixed back generation one tunnel close the road fm broadcast signal, described optical sender received signal blender must close the road fm broadcast signal and this signal is transferred in the network system.
The emergency center system platform builds the equipment of emergency system at front end, can carry out unified management, can the cunicular emergent broadcasting of administrative institute by centring system.
Audio frequency apparatus among Fig. 5, Audio Matrix, sound console, signal mixer and optical sender can utilize the existing equipment on the market.
The network system of second kind of FM broadcasting indoor covering system of the present utility model as shown in Figure 2.Wherein, emergent indoor covering system comprises indoor covering system and emergency broadcase system.Wherein indoor covering system has two kinds of forms as shown in Figure 3, Figure 4, and indoor covering system is consistent with first kind of FM broadcasting indoor covering system, is applicable to different tunnel situations respectively.
In second kind of FM broadcasting indoor covering system, emergency broadcase system as shown in Figure 6.As shown in Figure 6, described emergency broadcase system comprises optical receiver, multichannel FM demodulator, the second broadcast microphone, second audio frequency apparatus, sound console, Audio Matrix, frequency interleaved modulation modulator, signal mixer and optical sender.Described optical receiver receive from second optical transport network of the network system shown in Fig. 2 or second optical transport network close the road fm broadcast signal, and be connected with the multichannel FM demodulator.The multichannel FM demodulator will be closed road fm broadcast signal demodulation, output multichannel FM broadcasting audio signal.Described broadcast microphone can be imported emergent voice broadcast, second audio frequency apparatus can be play the tunnel audio content, the audio frequency of the broadcast microphone and second audio frequency apparatus is connected with sound console, audio frequency such as sound console output microphone and DVD are to Audio Matrix equipment, Audio Matrix is to the FM broadcasting audio signal of set-top box input, the audio signal of sound console is exported switching, the audio signal that is switched by tone frequency channel wire respectively with Fig. 6 in frequency interleaved modulation modulator 1, frequency interleaved modulation modulator 2 ... the input port of frequency interleaved modulation modulator 10 is connected, described frequency interleaved modulation modulator is modulated to fm broadcast signal on the corresponding modulation frequency, pass the signal in the signal mixer by radio frequency interface, described signal mixer is connected with more than one frequency interleaved modulation modulator, the multichannel fm broadcast signal is mixed the back produce one the tunnel and close the road fm broadcast signal, the closing the road fm broadcast signal and this signal is transferred to the input of first optical receiver of the indoor covering system among Fig. 3 or the input of the image intensifer of the indoor covering system among Fig. 4 of described optical sender received signal blender.
The utility model emergency broadcase system builds each equipment in the emergency system in the tunnel, can allow tunnel management department manage emergent broadcasting voluntarily, the signal in independent control tunnel is imported and control, is particularly suitable for independent some large tunnels controlled of emergent broadcasting.
Claims (6)
1. a FM broadcasting indoor covering system is characterized in that: comprise center system platform, network system and indoor covering system; Described center system platform comprises and is used to distribute with the catv distributor of transmission of digital broadcast singal, above set-top box, frequency interleaved modulation modulator, the signal mixer corresponding with set-top box and is used for and will closes the optical sender that the road fm broadcast signal is transferred to first optical transport network; The input of described each set-top box is connected with the output of catv distributor by coaxial cable respectively, the output of described each set-top box is connected with the input of corresponding frequency interleaved modulation modulator by tone frequency channel wire respectively, described each frequency interleaved modulation modulator is connected with the input of signal mixer by radio frequency interface, and the output of described signal mixer is connected with described optical sender; Described network system comprises first optical transport network, two branch center machine rooms, second optical transport network, the 3rd optical transport network and corresponding indoor covering system, each branch center machine room comprises interconnective image intensifer and optical branching device, described first optical transport network is connected with the input of the image intensifer of each branch center machine room, the output of the optical branching device of one of them branch center machine room is connected with the input of second optical transport network, the output of second optical transport network is connected with the input of corresponding indoor covering system, and the output of the optical branching device of another branch center machine room is connected with the input of the 3rd optical transport network; The output of the 3rd optical transport network is connected with corresponding indoor covering system.
2. FM broadcasting indoor covering system according to claim 1, it is characterized in that: described indoor covering system comprises first optical receiver and frequency modulation repeater, and comprise antenna system or leaky cable system, the input of described first optical receiver correspondingly is connected with second optical transport network or the 3rd optical transport network of described network system, the output of described first optical receiver is connected by the input of radio frequency line with the frequency modulation repeater, and the output of described frequency modulation repeater is connected with antenna system or leaky cable system by radio frequency line.
3. FM broadcasting indoor covering system according to claim 1, it is characterized in that: described indoor covering system comprises image intensifer, optical branching device, second optical receiver, the 3rd optical receiver and frequency modulation repeater, and comprise antenna system or leaky cable system, the input of described image intensifer correspondingly is connected with second optical transport network or the 3rd optical transport network of described network system, the output of described image intensifer is connected with the input of optical branching device, the output of described optical branching device is connected with the input of second optical receiver with the 3rd optical receiver respectively, each is connected with the input of a described frequency modulation repeater output of described second optical receiver and the 3rd optical receiver by radio frequency line respectively, and each is connected with an antenna system or leaky cable system the output of each described frequency modulation repeater by radio frequency respectively.
4. FM broadcasting indoor covering system, it is characterized in that: comprise emergency center system platform, network system and emergent indoor covering system, described emergent indoor covering system comprises indoor covering system and emergency broadcase system; Described emergency center system platform comprises the catv distributor that is used for receiving digital broadcast signal, above set-top box, the first broadcast microphone, first audio frequency apparatus, first sound console, first Audio Matrix, first frequency interleaved modulation modulator, first signal mixer and be used for and will close first optical sender that the road fm broadcast signal is transferred to first optical transport network more than one; The output of described catv distributor is connected with the input of each set-top box by coaxial cable respectively, the described first broadcast microphone is connected with the input of first sound console respectively with first audio frequency apparatus, the output of described first sound console, the output of each described set-top box is connected with the input of described first Audio Matrix respectively, the output of described first Audio Matrix is connected with the input of each first frequency interleaved modulation modulator by tone frequency channel wire simultaneously, the output of each first frequency interleaved modulation modulator is connected with the input of described first signal mixer respectively, and the output of described first signal mixer is connected with the input of described first optical sender; Described network system comprises first optical transport network, two branch center machine rooms, second optical transport network, the 3rd optical transport network and corresponding indoor covering system, each branch center machine room comprises interconnective image intensifer and optical branching device, described first optical transport network is connected with the input of the image intensifer of each branch center machine room, the output of the optical branching device of one of them branch center machine room is connected with the input of second optical transport network, the output of second optical transport network is connected with the input of corresponding indoor covering system, and the output of the optical branching device of another branch center machine room is connected with the input of the 3rd optical transport network; The output of the 3rd optical transport network is connected with corresponding indoor covering system;
Described emergency broadcase system comprises optical receiver, the multichannel FM demodulator, the second broadcast microphone, second audio frequency apparatus, second sound console, second Audio Matrix, second frequency interleaved modulation modulator more than one, secondary signal blender and be used for and close second optical sender that the road fm broadcast signal is transferred to indoor covering system from what the secondary signal blender received, described optical receiver is connected with the multichannel FM demodulator, the second broadcast microphone is connected with the input of second sound console respectively with second audio frequency apparatus, second Audio Matrix is connected by the input port of tone frequency channel wire with each second frequency interleaved modulation modulator, the output of each second frequency interleaved modulation modulator is connected with the input of described secondary signal blender respectively, and the output of described secondary signal blender is connected with the input of described second optical sender.
5. FM broadcasting indoor covering system according to claim 4, it is characterized in that: described indoor covering system comprises first optical receiver and frequency modulation repeater, and comprise antenna system or leaky cable system, the input of described first optical receiver correspondingly is connected with second optical transport network or the 3rd optical transport network of described network system, the output of described first optical receiver is connected by the input of radio frequency line with the frequency modulation repeater, and the output of described frequency modulation repeater is connected with antenna system or leaky cable system by radio frequency line.
6. FM broadcasting indoor covering system according to claim 4, it is characterized in that: described indoor covering system comprises image intensifer, optical branching device, second optical receiver, the 3rd optical receiver and frequency modulation repeater, and comprise antenna system or leaky cable system, the input of described image intensifer correspondingly is connected with second optical transport network or the 3rd optical transport network of described network system, the output of described image intensifer is connected with the input of optical branching device, the output of described optical branching device is connected with the input of second optical receiver with the 3rd optical receiver respectively, each is connected with the input of a described frequency modulation repeater output of described second optical receiver and the 3rd optical receiver by radio frequency line respectively, and each is connected with an antenna system or leaky cable system the output of each described frequency modulation repeater by radio frequency respectively.
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| CN2011200853595U CN201976118U (en) | 2011-03-28 | 2011-03-28 | Indoor coverage system of frequency modulation broadcast |
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| CN2011200853595U CN201976118U (en) | 2011-03-28 | 2011-03-28 | Indoor coverage system of frequency modulation broadcast |
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